Answer to Question #259098 in Organic Chemistry for 809

Question

Lead metal is obtained from lead sulphide through the following reaction:

2PbS(s) + 2C(s) + 3O₂(g) → 2Pb(s) +2CO(g) + 2SO₂(g)

Calculate mass of oxygen is needed to produce 500g of lead metal?

Answer 1

Molar mass of Pb= 207.2g

500/207.2= 2.413

Mole ratio Pb:O2= 2:3

Molar mass of O2= 31.998

= 31.998×2.413×3/2

= 115.823g